Buying guides

Start here if you're not sure what to buy. Our guides compare types and models for UK homes, with real £ pricing and honest picks.

• Best Countertop Water Filter UK (2026) — No-Plumbing Picks for Renters

  The best countertop water filters for UK homes in 2026. No-plumbing reverse osmosis systems ranked on certification, UK price and renter-friendliness.

• Best Reverse Osmosis System UK (2026) — Tested Specs, UK Pricing & Honest Picks

  The best reverse osmosis systems for UK homes in 2026, ranked on NSF certification, hard-water performance, efficiency and real UK owner reviews.

• Best Under-Sink Water Filter UK (2026) — Top Plumbed-In Systems Ranked

  The best under-sink water filters for UK homes in 2026. We rank plumbed-in reverse osmosis systems on certification, hard-water performance and UK price.

• Best Water Filter for Hard Water UK (2026) — Beat Limescale for Good

  The best water filters for hard water in the UK. We rank reverse osmosis systems that tackle limescale, lead and PFAS in hard-water areas like London.

• Best Water Filter for London (2026) — Picks for the UK's Hardest Water

  London has some of the UK's hardest water (~280 mg/L). We pick the best water filters for London homes, with honest advice for hard water, PFAS and renters.

• Best Water Filter UK (2026) — Honest, Research-Based Picks for Every Home

  Our independent pick of the best water filters for UK homes in 2026, compared on certification, hard-water performance, UK pricing and owner reviews.